Posted by **roro** on Sunday, October 21, 2012 at 9:01pm.

A 0.30 kg mass is attached to a spring with a spring constant 170 N/m so that the mass is allowed to move on a horizontal frictionless surface. The mass is released from rest when the spring is compressed 0.15 m.

(a) Find the force on the mass.

N

(b) Find its acceleration at this instant

m/s2

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